Charles b



(No Model.)

0. B. CLARK. TEMPORARY BINDER.

No. 443,667. Patented Dec. 30, 1890 NITED STATES ATENT- Orrion.

CHARLES B. CLARK, OF CHICAGO, ILLINOIS, ASSIGN OR TO ALBERT R. BAKER, OF INDIANAPOLIS, INDIANA.

TEMPORARY BINDER.

SPECIFICATION forming part of Letters Patent No. 443,667, dated December 30, 1890.

(No model.)

To all whom it may concern.-

Be it known that I, CHARLES E. CLARK, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Im-- provement in Temporary Binders, of which the following is a specification.

This invention is an improvement upon the class of temporary binders shown in the patent to Brown, No. 399,737, of March 19, 1889.

The object of the invention is to so construct binders of this class that the movable clamp-bar will when the binder is full be absolutely locked against slipping off the rods upon which it slides.

The Brown binders and others of the same class are provided with a movable clamp-bar mounted to slide on the binder-rods, and one or more springs secured to the clamp-bar and adapted to bear against the rods and act as friction devices to secure said bar in whatever position it may be adjusted upon the rods. In my present improvement I form at the top of the rods notches which the spring may enter, and which will allow the spring to come flat against the clamp-bar. When thus engaging the notch and lying in this position relative to the clamp-bar, the bar is absolutely held by the spring against being pulled or forced off the rod, and the papers filed in the binder are securely held.

The nature of my improvement will be more fullyunderstoodfrom theaccompanyingdrawin gs, wherein- Figure 1 is a perspective view of the binder partially filled. Fig. 2 is an elevation of the metal parts of the binder detached and partly in section, showing the movable clamp-bar in the position occupied by it when the binder is full.

In said drawings, A A represent the wide boards forming the covers of the binder, and

the rods to hold the movable clam p-bar. They may, if preferred, be made in one piece, as illustrated, though that is not essential, and they may bear either against the outside or the inside of the bars, as preferred. In the construction shown they are perforated, so as to surround the bars, and their outer endsm afford convenient means to relieve the springs from contact with the rods when the movable bar is to be raised, the openings f in the springs being elongated to permit this operation. The spring is riveted to the movable clamp-bar, as shown at g. At the tops the rods D are notched, as shown at (Z, and these notches may be,'and preferably are, annular and formed by turning the rod in a lathe, as in that case it is immaterial which side is presented to the springs. With these notches it will be noticed that when the movable clamp-bar is raised sufficiently to enable the springs to engage under them the springs will assume a horizontal position and rest uponthe surface of the movable clamp-bar. That which in other positions is a mere frictional contact is thus converted into a positive lock which holds the clamp-bar securely against the internal pressure from the contents of the binder, and also prevents any accidental slipping off of the bar. This feature adapts the binder to use as a permanent file when it is once filled without preventing its reuse as a temporary file, or the removability of the clamping-bar, should it be necessary to take out any of the papers.

I claim- 1. The combination, in a binder, with the vertical rods and the clamp-bar sliding there on, of a friction-spring borne upon the clampbar and bearing upon said rods, the latter bein g provided with notches at their tops, giving room to the spring and acting as positive stops, substantially as set forth.

2. The combination,in a binder, of the rods D, having the notches (Z at their upper ends,

the movable clamp-bar E, and the springs F, substantially as set forth.

3. The combination, in a temporary binder, of the covers A, the narrow boards a, the bar 0, the vertical rods D, having notches d, the movable clamping-bar E, and springs F, adapted to bear friotionally upon said rods and to enused as a permanent file,substmitinlly as set gage in said notches, substantially as set forth. forth.

4. In atemporarybinder,aremovable clamping-baradjustable upon vertical rods and held (/HARLhb 5 thereon by friction, and also adapted to be \Vitnesses:

locked positively to the rods at its outermost GEO. B. STEVENS,

position, whereby the binder is adapted to be XV. Q. HUNT. 

